uncompress and gzip don't like getting only 4k of the file... pass them

the entire file (but we still only read 4k, so they don't get to run
for long).

PR:		4097
Submitted by:	Marcin Cieslak <saper@system.pl>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83084 13f79535-47bb-0310-9956-ffa450edef68